Note 8 - Stock Compensation (Detail) - Stock Options Activities (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Outstanding at December 31, 2012		191,200
Outstanding at December 31, 2012 (in Dollars per share)		$ 5.64
Outstanding at December 31, 2012	8 years 215 days	8 years 251 days
Outstanding at December 31, 2012 (in Dollars)		$ 0
Outstanding at March 31, 2013	213,700
Outstanding at March 31, 2013 (in Dollars per share)	$ 5.42
Outstanding at March 31, 2013	8 years 215 days	8 years 251 days
Outstanding at March 31, 2013 (in Dollars)	15,652
Exercisable at March 31, 2013	70,283
Exercisable at March 31, 2013 (in Dollars per share)	$ 6.40
Exercisable at March 31, 2013	8 years 65 days
Exercisable at March 31, 2013 (in Dollars)	$ 352
Granted	22,500
Granted (in Dollars per share)	$ 3.55
Exercised	0
Exercised (in Dollars per share)	$ 0
Forfeited	0
Forfeited (in Dollars per share)	$ 0